Torch not showing an emission node
This isnt the best way for this but it should work for what you need. 

The problem with the set up below is the brown stick part is also illuminated not just the fire part. The best way to do that is to have 2 different materials one for the stick and one for the fire (with just the emission on the fire.) Or you could use a vertical falloff ramp but that may be overkill for what you are looking for. Hope the below set up helps you. 

Or you can skip this whole step and just put a point light where your torch is.